I would agree that this points to a physical disk problem on your server. Your only recourse may be to recover from your previous backup at this point. Check your SQL Server Error Log for 824 and 825 errors in the log. Run drive diagnostics and then CHECKDB to find the extent of the damage.
Jonathan Kehayias | Principal Consultant | MCM: SQL Server 2008
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Troubleshooting SQL Server: A Guide for Accidental DBAs[/url]